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Finding the Fourth Proportional to 718,123.86, 991,011.03 and 395,841

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Solution

The fourth proportional to 718,123.86, 991,011.03 and 395,841 is: 546,260.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,123.86 : 991,011.03 = 395,841 : x
  2. Step 2: Convert to fraction form
    718,123.86/991,011.03 = 395,841/x
  3. Step 3: Cross multiply
    718,123.86x = 991,011.03 × 395,841
  4. Step 4: Simplify right side
    718,123.86x = 392,282,797,126.23
  5. Step 5: Solve for x
    x = 392,282,797,126.23/718,123.86
  6. Step 6: Final answer
    x = 546,260.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.